In hybrid sustainable energy conversion systems, multi-input boost converters (MIBC) became widely used to enhance the stability and reliability. However, conventional boost converters have difficulties of low efficiency, implementation size and cost

Aim:

• To improve these drawbacks, this work proposes a novel modularized multi-input bridgeless boost converter (MIBBC) that interfaces the hybrid AC/DC power sources to DC microgrid.
• The main advantages for proposed topology are:
  • Higher efficiencyReduced size and weight
  • Unity power factor operation
  • Adjustment of DC-bus voltage
  • Robustness
• MIBBC topology is experimentally validated with results obtained from 72-kW prototype that has been built and tested based on TMS320F28335 DSP.

 

Conversion Topologies:

System Modelling:

 

Experimental Setup:

 

 

Test Results:

• Wind Generator Performance:
  

 

 

• DC Reference Step Change Test:

 

*Parallel Operation Test                                                         *Parametric Variation

 

*Efficiency Comparision                                                      *Generator PF

 

Conclusion:

• The MIBBC has been investigated and experimental results verified:
  • Higher efficiency (97.8%)
  • Larger output power density
  • Unity power factor operation (0.998)
  • Less cost (modularity)
  • Comprehensive design (4-ports)
• The test results have demonstrated the proposed system effectiveness for a wide power range.